``` 'YOUR_PUBLIC_KEY_ID', 'private_key' => 'keys/private.pem', // Path to RSA Private Key (or a string representation) 'region' => 'YOUR_REGION_CODE', 'algorithm' => 'AMZN-PAY-RSASSA-PSS-V2' ); $payload = array( 'chargeAmount' => array( 'amount' => '14.00', 'currencyCode' => 'USD' ) ); try { $client = new Amazon\Pay\API\Client($amazonpay_config); $result = $client->completeCheckoutSession('bd504926-f659-4ad7-a1a9-9a747aaf5275', $payload); if ($result['status'] === 202) { // Charge Permission is in AuthorizationInitiated state $response = json_decode($result['response'], true); $checkoutSessionState = $response['statusDetails']['state']; $chargeId = $response['chargeId']; $chargePermissionId = $response['chargePermissionId']; } else if ($result['status'] === 200) { $response = json_decode($result['response'], true); $checkoutSessionState = $response['statusDetails']['state']; $chargePermissionId = $response['chargePermissionId']; } else { // check the error echo 'status=' . $result['status'] . '; response=' . $result['response'] . "\n"; } } catch (Exception $e) { // handle the exception echo $e; } ?> ```

``` using Amazon.Pay.API.Types; using Amazon.Pay.API.WebStore; using Amazon.Pay.API.WebStore.Types; using Amazon.Pay.API.WebStore.CheckoutSession; public class Sample { public WebStoreClient InitiateClient() { // set up config var payConfiguration = new ApiConfiguration ( region: Region.YOUR_REGION_CODE, publicKeyId: "YOUR_PUBLIC_KEY_ID", privateKey: "PATH_OR_CONTENT_OF_YOUR_PRIVATE_KEY", algorithm: AmazonSignatureAlgorithm.V2 ); // init API client var client = new WebStoreClient(payConfiguration); return client; } public CheckoutSessionResponse CompleteCheckoutSession(string checkoutSessionId) { // prepare the request var request = new CompleteCheckoutSessionRequest(14.00M, Currency.USD); // send the request var result = client.CompleteCheckoutSession(checkoutSessionId, request); // check if API call was successful if (!result.Success) { // do something, e.g. throw an error } return result; } } ```

``` import com.amazon.pay.api.AmazonPayResponse; import com.amazon.pay.api.PayConfiguration; import com.amazon.pay.api.WebstoreClient; import com.amazon.pay.api.exceptions.AmazonPayClientException; import com.amazon.pay.api.types.Region; import org.json.JSONObject; public void sample() { PayConfiguration payConfiguration = null; try { payConfiguration = new PayConfiguration() .setPublicKeyId("YOUR_PUBLIC_KEY_ID") .setRegion(Region.YOUR_REGION_CODE) .setPrivateKey("YOUR_PRIVATE_KEY") .setAlgorithm("AMZN-PAY-RSASSA-PSS-V2"); WebstoreClient webstoreClient = new WebstoreClient(payConfiguration); AmazonPayResponse response = null; String checkoutSessionId = "bd504926-f659-4ad7-a1a9-9a747aaf5275"; JSONObject payload = new JSONObject(); JSONObject chargeAmount = new JSONObject(); chargeAmount.put("amount", "14.00"); chargeAmount.put("currencyCode", "USD"); payload.put("chargeAmount", chargeAmount); response = webstoreClient.completeCheckoutSession(checkoutSessionId, payload); String chargePermissionId = response.getResponse().getString("chargePermissionId"); } catch (AmazonPayClientException e) { e.printStackTrace(); } } ```

```html const fs = require('fs'); const Client = require('@amazonpay/amazon-pay-api-sdk-nodejs'); const config = { publicKeyId: 'YOUR_PUBLIC_KEY_ID', privateKey: fs.readFileSync('tst/private.pem'), region: 'YOUR_REGION_CODE', algorithm: 'AMZN-PAY-RSASSA-PSS-V2' }; const payload = { chargeAmount: { amount: "14.00", currencyCode: "USD" } }; const testPayClient = new Client.WebStoreClient(config); const response = testPayClient.completeCheckoutSession('bd504926-f659-4ad7-a1a9-9a747aaf5275', payload); response.then(function (result) { console.log(result.data); }).catch(err => { console.log(err); }); ```

``` 'YOUR_PUBLIC_KEY_ID', 'private_key' => 'keys/private.pem', // Path to RSA Private Key (or a string representation) 'region' => 'YOUR_REGION_CODE', 'sandbox' => true, 'algorithm' => 'AMZN-PAY-RSASSA-PSS-V2' ); $payload = array( 'chargeAmount' => array( 'amount' => '14.00', 'currencyCode' => 'USD' ) ); try { $client = new Amazon\Pay\API\Client($amazonpay_config); $result = $client->completeCheckoutSession('bd504926-f659-4ad7-a1a9-9a747aaf5275', $payload); if ($result['status'] === 202) { // Charge Permission is in AuthorizationInitiated state $response = json_decode($result['response'], true); $checkoutSessionState = $response['statusDetails']['state']; $chargeId = $response['chargeId']; $chargePermissionId = $response['chargePermissionId']; } else if ($result['status'] === 200) { $response = json_decode($result['response'], true); $checkoutSessionState = $response['statusDetails']['state']; $chargePermissionId = $response['chargePermissionId']; } else { // check the error echo 'status=' . $result['status'] . '; response=' . $result['response'] . "\n"; } } catch (Exception $e) { // handle the exception echo $e; } ?> ```

``` using Amazon.Pay.API.Types; using Amazon.Pay.API.WebStore; using Amazon.Pay.API.WebStore.Types; using Amazon.Pay.API.WebStore.CheckoutSession; public class Sample { public WebStoreClient InitiateClient() { // set up config var payConfiguration = new ApiConfiguration ( region: Region.YOUR_REGION_CODE, environment: Environment.Sandbox, publicKeyId: "YOUR_PUBLIC_KEY_ID", privateKey: "PATH_OR_CONTENT_OF_YOUR_PRIVATE_KEY", algorithm: AmazonSignatureAlgorithm.V2 ); // init API client var client = new WebStoreClient(payConfiguration); return client; } public CheckoutSessionResponse CompleteCheckoutSession(string checkoutSessionId) { // prepare the request var request = new CompleteCheckoutSessionRequest(14.00M, Currency.USD); // send the request var result = client.CompleteCheckoutSession(checkoutSessionId, request); // check if API call was successful if (!result.Success) { // do something, e.g. throw an error } return result; } } ```

``` import com.amazon.pay.api.AmazonPayResponse; import com.amazon.pay.api.PayConfiguration; import com.amazon.pay.api.WebstoreClient; import com.amazon.pay.api.exceptions.AmazonPayClientException; import com.amazon.pay.api.types.Environment; import com.amazon.pay.api.types.Region; import org.json.JSONObject; public void sample() { PayConfiguration payConfiguration = null; try { payConfiguration = new PayConfiguration() .setPublicKeyId("YOUR_PUBLIC_KEY_ID") .setRegion(Region.YOUR_REGION_CODE) .setPrivateKey("YOUR_PRIVATE_KEY") .setEnvironment(Environment.SANDBOX) .setAlgorithm("AMZN-PAY-RSASSA-PSS-V2"); WebstoreClient webstoreClient = new WebstoreClient(payConfiguration); AmazonPayResponse response = null; String checkoutSessionId = "bd504926-f659-4ad7-a1a9-9a747aaf5275"; JSONObject payload = new JSONObject(); JSONObject chargeAmount = new JSONObject(); chargeAmount.put("amount", "14.00"); chargeAmount.put("currencyCode", "USD"); payload.put("chargeAmount", chargeAmount); response = webstoreClient.completeCheckoutSession(checkoutSessionId, payload); String chargePermissionId = response.getResponse().getString("chargePermissionId"); } catch (AmazonPayClientException e) { e.printStackTrace(); } } ```

```html const fs = require('fs'); const Client = require('@amazonpay/amazon-pay-api-sdk-nodejs'); const config = { publicKeyId: 'YOUR_PUBLIC_KEY_ID', privateKey: fs.readFileSync('tst/private.pem'), region: 'YOUR_REGION_CODE', sandbox: true, algorithm: 'AMZN-PAY-RSASSA-PSS-V2' }; const payload = { chargeAmount: { amount: "14.00", currencyCode: "USD" } }; const testPayClient = new Client.WebStoreClient(config); const response = testPayClient.completeCheckoutSession('bd504926-f659-4ad7-a1a9-9a747aaf5275', payload); response.then(function (result) { console.log(result.data); }).catch(err => { console.log(err); }); ```

paymentIntent	Description
AuthorizeWithCapture	Payment has been authorized and captured. 1. Store the `ChargeId` - You must store the `ChargeId` to process refunds. 2. Store the `ChargePermissionId` - If you specified `totalOrderAmount` and there is uncaptured payment, see manage deferred payments for more information. You can also use the `ChargePermissionId` to retrieve buyer and transaction info using Get Charge Permission for 30 days, you must store the data to persist the information beyond 30 days.
Authorize	Payment has been authorized. 1. Store the `ChargeId` - You must store the ChargeID for deferred payment capture. See deferred transactions for more info. 2. Store the `ChargePermissionId` - If you specified `totalOrderAmount` and there is uncaptured payment, see manage deferred payments for more information. You can also use the `ChargePermissionId` to retrieve buyer and transaction info using Get Charge Permission for 30 days, you must store the data to persist the information beyond 30 days.
Confirm	Payment has not been authorized or captured. 1. Store the `ChargePermissionId` - You must store the `ChargePermissionId` for deferred payment authorization. See deferred transactions for more info. You can also use the `ChargePermissionId` to retrieve buyer and transaction info after checkout. You will only be able to retrieve the data using Get Charge Permission for 30 days, you must store the data to persist the information beyond 30 days.

Name	Location	Description
checkoutSessionId (required) Type: string	Path parameter	Checkout Session identifier
chargeAmount (required) Type: price	Body	Amount to be processed using `paymentIntent` during checkout. Must match Checkout Session object `paymentDetails.chargeAmount`
totalOrderAmount Type: price	Body	Total order amount. Must match Checkout Session object `paymentDetails.totalOrderAmount` if a value was provided